BigPatents India

The invention relates to pyridone-methide azo dyestuffs, processes for their preparation, their use and coupling components containing pyridone-methide Azo dyestuffs which contain a coupling component based on methylene-triazolo-pyridines are already known from DE-A 4 020 768 and DE-A 4 329 296. However, these azo dyestuffs still have some disadvantages in their use. Thus, for example, their build-up capacity and their stability in the dyebath when used for dyeing polyester is not satisfactory.